Deadlock avoidance in an automated guidance vehicle system using a coloured Petri net model

Deadlock avoidance in an automated guidance vehicle system using a coloured Petri net model

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Article ID: iaor20022901
Country: United Kingdom
Volume: 40
Issue: 1
Start Page Number: 223
End Page Number: 238
Publication Date: Jan 2002
Journal: International Journal of Production Research
Authors: ,
Keywords: production
Abstract:

This paper addresses the problem of deadlock control in automated guided vehicle (AGV) systems for automated manufacturing systems with unidirectional guided paths. First, a Petri net (PN) model was developed for the problem. Then, by using the PN model developed, the condition for deadlock-free operation in AGV system and a control law are presented. To avoid deadlocks in AGV systems by this law, one needs only to observe the state of the system and check the number of free spaces available in some of the circuits. It is estimated that the proposed control law is simple enough to be used in the real-time control of contemporary system configuration. Three examples are used to show the application and efficiency of the proposed control law.

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